[SCHEDULE 13G] NXG Cushing Midstream Energy Fund SEC Filing

Rhea-AI Filing Summary

Sit Investment Associates, Inc. and Sit Fixed Income Advisors II, LLC report beneficial ownership of 323,176 shares of NXG Cushing Midstream Energy Fund common stock, representing 5.2% of the fund’s outstanding shares. The percentage is based on 6,223,470 shares outstanding as of May 31, 2025, as adjusted for the issuer’s December 11, 2025 rights offering and offering program. Both entities are registered investment advisers and hold shared voting and dispositive power over these shares through client accounts they manage. The firms state that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the fund, and they formally disclaim beneficial ownership beyond their advisory role.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

NXG Cushing Midstream Energy Fund

(Name of Issuer)

Common Stock

(Title of Class of Securities)

231631300

(CUSIP Number)

12/31/2025

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

SCHEDULE 13G

CUSIP No. 231631300

1

Names of Reporting Persons

Sit Investment Associates, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MINNESOTA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 323,176.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 323,176.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

323,176.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP No. 231631300

1

Names of Reporting Persons

Sit Fixed Income Advisors II, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 323,176.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 323,176.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

323,176.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.2 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: NXG Cushing Midstream Energy Fund
(b)	Address of issuer's principal executive offices: 600 N. Pearl Street, Suite 1205 Dallas, Texas, 75201
Item 2.
(a)	Name of person filing: Sit Investment Associates, Inc. Sit Fixed Income Advisors II, LLC
(b)	Address or principal business office or, if none, residence: c/o Sit Investment Associates, Inc. 80 South Eighth Street, Suite 3300 Minneapolis, MN 55402
(c)	Citizenship: Sit Investment Associates, Inc. Minnesota Corporation Sit Fixed Income Advisors II, LLC Delaware LLC
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 231631300
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to item 9 on each cover page.
(b)	Percent of class: See response to item 11 on each cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See response to item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See response to item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See response to item 8 on each cover page. The ownership percentages reported are based on 6,223,470 shares of common stock outstanding as of May 31, 2025, as reported in the Issuer's Report on Form N-CSRS filed with the Securities Exchange Commission, as adjusted for the Issuer's rights offering on December 11, 2025, and the Issuer's offering program. Sit Investment Associates, Inc. ("SIA") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940. Sit Fixed Income Advisors II, LLC ("SFI") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940 and a subsidiary of SIA. SIA and SFI provide investment management services to client accounts ("Accounts"). In their roles as investment advisers SIA and SFI possess shared voting and investment power over securities of the Issuer described in this schedule 13G owned by the Accounts and may be deemed to be the beneficial owner of such shares of the Issuer owned by the Accounts. All securities reported in this schedule 13G are owned by the Accounts. Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), SIA and SFI disclaim beneficial ownership of such securities.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Accounts are known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities. Except as may be indicated if this is a joint filing with a registered investment company managed by SIA or SFI, not more than 5% of the class of such securities is owned by any one Account subject to the investment advice of SIA or SFI.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under ?? 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Sit Investment Associates, Inc.

Signature:	/s/ Paul E. Rasmussen
Name/Title:	Paul Rasmussen / Vice President
Date:	01/06/2026

Sit Fixed Income Advisors II, LLC

Signature:	/s/ Paul E. Rasmussen
Name/Title:	Paul Rasmussen / Vice President
Date:	01/06/2026

Exhibit Information

Exhibit A - Joint Filing Agreement

FAQ

What ownership stake in NXG Cushing Midstream Energy Fund (SRV) do Sit Investment Associates and Sit Fixed Income Advisors report?

They report beneficial ownership of 323,176 shares of common stock of NXG Cushing Midstream Energy Fund, representing 5.2% of the outstanding shares.

Who are the reporting persons in this Schedule 13G for SRV?

The reporting persons are Sit Investment Associates, Inc., a Minnesota corporation, and Sit Fixed Income Advisors II, LLC, a Delaware LLC and subsidiary of Sit Investment Associates, Inc.

How much voting and dispositive power do the Sit entities report over SRV shares?

Each reporting person reports 0 shares with sole voting or dispositive power and 323,176 shares with shared voting and shared dispositive power.

On what share count is the 5.2% ownership in SRV based?

The 5.2% ownership is calculated using 6,223,470 shares of common stock outstanding as of May 31, 2025, as reported by the issuer and adjusted for its December 11, 2025 rights offering and offering program.

How are the reported SRV shares held by Sit Investment Associates and Sit Fixed Income Advisors?

All reported securities are held in client accounts for which the firms provide investment management services. The accounts have the right to receive dividends and sale proceeds, and no single account holds more than 5% of the class.

Are the Sit entities seeking to influence control of NXG Cushing Midstream Energy Fund (SRV)?

No. They certify that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control of the issuer or in connection with any transaction having that purpose or effect.

Do Sit Investment Associates and Sit Fixed Income Advisors claim full beneficial ownership of the SRV shares?

The firms may be deemed beneficial owners because they have shared voting and investment power as advisers to client accounts, but they expressly disclaim beneficial ownership of the securities under Rule 13d-4.